In the memorandum, Crown lawyer Jeremy Prebble questions whether the two men are purporting to represent claimants and hapu or whanau that will have their settlements dealt with under the umbrella of the Te Rarawa deed of settlement.
"This issue is central to the question of whether the present claimants are in essence bringing a mandate dispute or whether the claimants are seeking to assert overlapping interests in the Te Rarawa area of interest," he says.
Mr Prebble asks the tribunal to tell the two men to provide the requested information by Monday.
He also requests a three-day extension to the December 13 deadline for it to respond to the Wai 2344 claim.
Meanwhile, a memorandum which Te Runanga o Ngati Hine lawyer Michael Doogan filed with the tribunal on Wednesday questions the adequacy of tribunal resources to conduct stage 2 of its Te Paparahi o Te Raki district inquiry.
Mr Doogan records tribunal comment on the issue and includes a decision by Justice McGechan which includes the statement: "The tribunal is not being resourced to operate, and is not able to operate, in a satisfactory manner."